One of the most commonly-used British phrases, ‘rubbish’ is used to mean both general waste and trash, and to also express disbelief in something to the point of ridicule (in this sense it is a much-more PG-friendly version of ‘bollocks’.)

For example, it can be used respectively, in, ‘Can you take the rubbish out please?’, and ‘What? Don’t talk rubbish.’